package Org.csmzxy.class2333;

class UserManager {
    static int userNum;  //定义静态变量userNum
    public UserManager() {
        userNum++;
    }
}
public class Example10 {
    public static void main(String[] args) {
        UserManager userManager = new UserManager();
        UserManager userManager1 = new UserManager();
        UserManager userManager2 = new UserManager();
        System.out.println("目前已创建的用户数量为" + UserManager.userNum);
    }
}
